Yes, Halon fire extinguishers can be used on electrical equipment- and in fact are often recommended.
Class C fire Extinguishers
Halon fire extinguishers are typically identified by their distinctive color, which is usually silver or chrome. This metallic finish helps differentiate them from other types of extinguishers, which may be painted in various colors based on the type of fire they are designed to combat. It's important to note that halon extinguishers are being phased out in many places due to environmental concerns.
The gas commonly found in fire extinguishers is carbon dioxide (CO2) for certain types of extinguishers, which is effective for smothering fires by displacing oxygen. Other extinguishers may use chemicals like halon or dry chemical agents such as monoammonium phosphate. Each type is designed for specific classes of fires, such as electrical, flammable liquids, or ordinary combustibles.
It is important because fire equipment that has not been rated for electrical fire use may conduct electricity and electro-fry the user, whereas equipment such as electrically rated fire extinguishers (class C) will not conduct electricity, therefore keeping the operator safe. If you want more information on fire extinguishers such as different types and which instance to use them I have provided a link with this post.
You can get fire extinguishers recharged at fire equipment companies, some hardware stores, and fire departments.
Anything other than water can be used on an electrical fire. These are often indicated on fire extinguishers as Class ABC or BC or even just C, where class C refers to fires caused by energized electrical conductors.
For electrical fires, the two primary pieces of equipment used are Class C fire extinguishers and fire blankets. Class C extinguishers are specifically designed to extinguish fires involving electrical equipment by using non-conductive agents. Fire blankets can also be used to smother small electrical fires and prevent the spread of flames. It's important to never use water on electrical fires, as it can conduct electricity and worsen the situation.
The most common are dry chemical extinguishers, which have the drawback of contaminating the circuitry if used. However, damage from the fire will likely be greater. The same applies to CO2 extinguishers, which can damage computers and peripherals with condensation from the air, and also damage circuit boards if they cool them down. The ideal electronics fire extinguisher is the halon gas extinguisher, which smothers the fire without doing extensive damage. The drawbacks are higher cost and the likelihood of environmental impact. Europe and Australia currently restrict or prohibit Halon use.
Class A fire extinguishers - used for fires caused by "ordinary combustibles" aka paper, wood, plastic, cardboard, etc.Class B fire extinguishers - used for fires caused by flammable liquids such as gasoline and oil.Class C fire extinguishers - used for electrical firesClass D fire extinguishers - used for fires caused by explosive or flammable metals (most commonly found in laboratoriesClass K fire extinguishers - used for fires found in commercial kitchens
Different types of fire equipment are designed for various fire classes. For instance, water extinguishers are effective for ordinary combustibles (Class A fires), while foam extinguishers can address flammable liquids (Class B fires). For electrical fires (Class C), carbon dioxide (CO2) extinguishers are suitable, and dry chemical extinguishers can tackle multiple fire classes, including A, B, and C. Additionally, specialized equipment like Class D extinguishers is used for metal fires, and wet chemical extinguishers are ideal for cooking oil fires (Class K).
Often turning off the power will cause an electrical fire to go out, so unplug the device or flip the circuit breaker. You can also use carbon dioxide fire extinguishers on electrical fires. In computer server rooms, there are sometimes HALON fire extinguishers built in. Halon isn't poisonous, but it displaces all of the oxygen from the room, so you want to GET OUT of a room where a halon fire extinguisher is used.
Extinguishers with a Class C rating (C can be used on Currents)